Solid phase extraction of uranium and thorium on octadecyl bonded silica modified with Cyanex 302 from aqueous solutions

A simple and reliable method for rapid extraction and determination of uranium and thorium using octadecyl-bonded silica modified with Cyanex 302 is presented. Extraction efficiency and the influence of various parameters such as aqueous phase pH, flow rate of sample solution and amount of extractan...

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Bibliographic Details
Published in:Journal of radioanalytical and nuclear chemistry 2013-03, Vol.295 (3), p.2111-2115
Main Authors: Nilchi, A., Dehaghan, T. Shariati, Garmarodi, S. Rasouli
Format: Article
Language:English
Subjects:
Aqueous solutions
Cartridges
Chemistry
Chemistry and Materials Science
Diagnostic Radiology
Extraction
Flow rate
Hadrons
Heavy Ions
Inorganic Chemistry
Nuclear Chemistry
Nuclear Physics
Physical Chemistry
Sea-water
Silica
Silicon dioxide
Thorium
Uranium
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Summary:A simple and reliable method for rapid extraction and determination of uranium and thorium using octadecyl-bonded silica modified with Cyanex 302 is presented. Extraction efficiency and the influence of various parameters such as aqueous phase pH, flow rate of sample solution and amount of extractant has been investigated. The study showed that the extraction of uranium and thorium increase with increasing pH value and was found to be quantitative at pH 6; and the retention of ions was not affected significantly by the flow rate of sample solution. The extraction percent were found to be 89.55 and 86.27 % for uranium and thorium, respectively. The maximal capacity of the cartridges modified by 30 mg of Cyanex 302 was found to be 20 mg of uranium and thorium. The method was successfully applied to the extraction and determination of uranium and thorium in aqueous solutions. The percentage recovery of uranium and thorium in a number of natural as well as seawater samples of Iran were also investigated and found to be in the range of 85–95 %.
ISSN:0236-5731
1588-2780
DOI:10.1007/s10967-012-2252-6